diff --git a/quickstep/recents_ui_overrides/res/values/override.xml b/quickstep/recents_ui_overrides/res/values/override.xml
index 6aa9619..1937164 100644
--- a/quickstep/recents_ui_overrides/res/values/override.xml
+++ b/quickstep/recents_ui_overrides/res/values/override.xml
@@ -25,8 +25,11 @@
 
   <string name="main_process_initializer_class" translatable="false">com.android.quickstep.QuickstepProcessInitializer</string>
 
-  <string name="user_event_dispatcher_class" translatable="false">com.android.quickstep.logging.UserEventDispatcherAppPredictionExtension</string>
+  <string name="user_event_dispatcher_class" translatable="false">com.android.quickstep.logging.UserEventDispatcherExtension</string>
 
   <string name="prediction_model_class" translatable="false">com.android.launcher3.hybridhotseat.HotseatPredictionModel</string>
+
+  <string name="model_delegate_class" translatable="false">com.android.launcher3.model.QuickstepModelDelegate</string>
+
 </resources>
 
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java
index e11c701..55384af 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionRowView.java
@@ -30,7 +30,6 @@
 import android.os.Build;
 import android.util.AttributeSet;
 import android.util.IntProperty;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.animation.Interpolator;
@@ -44,19 +43,15 @@
 import com.android.launcher3.DeviceProfile.OnDeviceProfileChangeListener;
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherSettings;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.R;
-import com.android.launcher3.allapps.AllAppsStore;
 import com.android.launcher3.allapps.FloatingHeaderRow;
 import com.android.launcher3.allapps.FloatingHeaderView;
 import com.android.launcher3.anim.AlphaUpdateListener;
 import com.android.launcher3.anim.PropertySetter;
-import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.keyboard.FocusIndicatorHelper;
 import com.android.launcher3.keyboard.FocusIndicatorHelper.SimpleFocusIndicatorHelper;
 import com.android.launcher3.logging.StatsLogUtils.LogContainerProvider;
-import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.ItemInfoWithIcon;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
@@ -67,15 +62,12 @@
 import com.android.quickstep.AnimatedFloat;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 
 @TargetApi(Build.VERSION_CODES.P)
 public class PredictionRowView extends LinearLayout implements
         LogContainerProvider, OnDeviceProfileChangeListener, FloatingHeaderRow {
 
-    private static final String TAG = "PredictionRowView";
-
     private static final IntProperty<PredictionRowView> TEXT_ALPHA =
             new IntProperty<PredictionRowView>("textAlpha") {
                 @Override
@@ -93,16 +85,14 @@
             (t) -> (t < 0.8f) ? 0 : (t - 0.8f) / 0.2f;
 
     private final Launcher mLauncher;
-    private final PredictionUiStateManager mPredictionUiStateManager;
     private int mNumPredictedAppsPerRow;
 
-    // The set of predicted app component names
-    private final List<ComponentKeyMapper> mPredictedAppComponents = new ArrayList<>();
-    // The set of predicted apps resolved from the component names and the current set of apps
-    private final ArrayList<ItemInfoWithIcon> mPredictedApps = new ArrayList<>();
     // Helper to drawing the focus indicator.
     private final FocusIndicatorHelper mFocusHelper;
 
+    // The set of predicted apps resolved from the component names and the current set of apps
+    private final List<WorkspaceItemInfo> mPredictedApps = new ArrayList<>();
+
     private final int mIconTextColor;
     private final int mIconFullTextAlpha;
     private int mIconLastSetTextAlpha;
@@ -134,8 +124,6 @@
         mLauncher = Launcher.getLauncher(context);
         mLauncher.addOnDeviceProfileChangeListener(this);
 
-        mPredictionUiStateManager = PredictionUiStateManager.INSTANCE.get(context);
-
         mIconTextColor = Themes.getAttrColor(context, android.R.attr.textColorSecondary);
         mIconFullTextAlpha = Color.alpha(mIconTextColor);
         mIconCurrentTextAlpha = mIconFullTextAlpha;
@@ -146,24 +134,9 @@
     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
-
-        mPredictionUiStateManager.setTargetAppsView(mLauncher.getAppsView());
-        getAppsStore().registerIconContainer(this);
         AllAppsTipView.scheduleShowIfNeeded(mLauncher);
     }
 
-    private AllAppsStore getAppsStore() {
-        return mLauncher.getAppsView().getAppsStore();
-    }
-
-    @Override
-    protected void onDetachedFromWindow() {
-        super.onDetachedFromWindow();
-
-        mPredictionUiStateManager.setTargetAppsView(null);
-        getAppsStore().unregisterIconContainer(this);
-    }
-
     public void setup(FloatingHeaderView parent, FloatingHeaderRow[] rows, boolean tabsHidden) {
         mParent = parent;
     }
@@ -205,7 +178,7 @@
      * Returns the predicted apps.
      */
     public List<ItemInfoWithIcon> getPredictedApps() {
-        return mPredictedApps;
+        return new ArrayList<>(mPredictedApps);
     }
 
     /**
@@ -217,12 +190,12 @@
      * If the number of predicted apps is the same as the previous list of predicted apps,
      * we can optimize by swapping them in place.
      */
-    public void setPredictedApps(List<ComponentKeyMapper> apps) {
-        mPredictedAppComponents.clear();
-        mPredictedAppComponents.addAll(apps);
-
+    public void setPredictedApps(List<ItemInfo> items) {
         mPredictedApps.clear();
-        mPredictedApps.addAll(processPredictedAppComponents(mPredictedAppComponents));
+        items.stream()
+                .filter(itemInfo -> itemInfo instanceof WorkspaceItemInfo)
+                .map(itemInfo -> (WorkspaceItemInfo) itemInfo)
+                .forEach(mPredictedApps::add);
         applyPredictionApps();
     }
 
@@ -264,11 +237,7 @@
             icon.reset();
             if (predictionCount > i) {
                 icon.setVisibility(View.VISIBLE);
-                if (mPredictedApps.get(i) instanceof AppInfo) {
-                    icon.applyFromApplicationInfo((AppInfo) mPredictedApps.get(i));
-                } else if (mPredictedApps.get(i) instanceof WorkspaceItemInfo) {
-                    icon.applyFromWorkspaceItem((WorkspaceItemInfo) mPredictedApps.get(i));
-                }
+                icon.applyFromWorkspaceItem(mPredictedApps.get(i));
                 icon.setTextColor(iconColor);
             } else {
                 icon.setVisibility(predictionCount == 0 ? GONE : INVISIBLE);
@@ -284,33 +253,6 @@
         mParent.onHeightUpdated();
     }
 
-    private List<ItemInfoWithIcon> processPredictedAppComponents(
-            List<ComponentKeyMapper> components) {
-        if (getAppsStore().getApps().length == 0) {
-            // Apps have not been bound yet.
-            return Collections.emptyList();
-        }
-
-        List<ItemInfoWithIcon> predictedApps = new ArrayList<>();
-        for (ComponentKeyMapper mapper : components) {
-            ItemInfoWithIcon info = mapper.getApp(getAppsStore());
-            if (info != null) {
-                ItemInfoWithIcon predictedApp = info.clone();
-                predictedApp.container = LauncherSettings.Favorites.CONTAINER_PREDICTION;
-                predictedApps.add(predictedApp);
-            } else {
-                if (FeatureFlags.IS_STUDIO_BUILD) {
-                    Log.e(TAG, "Predicted app not found: " + mapper);
-                }
-            }
-            // Stop at the number of predicted apps
-            if (predictedApps.size() == mNumPredictedAppsPerRow) {
-                break;
-            }
-        }
-        return predictedApps;
-    }
-
     @Override
     public void fillInLogContainerData(ItemInfo childInfo, LauncherLogProto.Target child,
             ArrayList<LauncherLogProto.Target> parents) {
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionUiStateManager.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionUiStateManager.java
deleted file mode 100644
index 830c103..0000000
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionUiStateManager.java
+++ /dev/null
@@ -1,348 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.launcher3.appprediction;
-
-import static com.android.launcher3.LauncherSettings.Favorites.ITEM_TYPE_APPLICATION;
-import static com.android.launcher3.LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT;
-import static com.android.launcher3.LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT;
-import static com.android.launcher3.LauncherState.BACKGROUND_APP;
-import static com.android.launcher3.LauncherState.OVERVIEW;
-
-import android.app.prediction.AppPredictor;
-import android.app.prediction.AppTarget;
-import android.content.ComponentName;
-import android.content.Context;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-import com.android.launcher3.InvariantDeviceProfile;
-import com.android.launcher3.InvariantDeviceProfile.OnIDPChangeListener;
-import com.android.launcher3.Launcher;
-import com.android.launcher3.LauncherAppState;
-import com.android.launcher3.LauncherSettings;
-import com.android.launcher3.LauncherState;
-import com.android.launcher3.Utilities;
-import com.android.launcher3.allapps.AllAppsContainerView;
-import com.android.launcher3.allapps.AllAppsStore.OnUpdateListener;
-import com.android.launcher3.hybridhotseat.HotseatPredictionController;
-import com.android.launcher3.icons.IconCache.ItemInfoUpdateReceiver;
-import com.android.launcher3.model.data.ItemInfo;
-import com.android.launcher3.model.data.ItemInfoWithIcon;
-import com.android.launcher3.shortcuts.ShortcutKey;
-import com.android.launcher3.statemanager.StateManager.StateListener;
-import com.android.launcher3.userevent.nano.LauncherLogProto;
-import com.android.launcher3.util.ComponentKey;
-import com.android.launcher3.util.MainThreadInitializedObject;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-import java.util.OptionalInt;
-import java.util.stream.IntStream;
-
-/**
- * Handler responsible to updating the UI due to predicted apps changes. Operations:
- * 1) Pushes the predicted apps to all-apps. If all-apps is visible, waits until it becomes
- * invisible again before applying the changes. This ensures that the UI does not change abruptly
- * in front of the user, even if an app launched and user pressed back button to return to the
- * all-apps UI again.
- * 2) Prefetch high-res icons for predicted apps. This ensures that we have the icons in memory
- * even if all-apps is not opened as they are shown in search UI as well
- * 3) Load instant app if it is not already in memory. As predictions are persisted on disk,
- * instant app will not be in memory when launcher starts.
- * 4) Maintains the current active client id (for the predictions) and all updates are performed on
- * that client id.
- */
-public class PredictionUiStateManager implements StateListener<LauncherState>,
-        ItemInfoUpdateReceiver, OnIDPChangeListener, OnUpdateListener {
-
-    public static final String LAST_PREDICTION_ENABLED_STATE = "last_prediction_enabled_state";
-
-    // TODO (b/129421797): Update the client constants
-    public enum Client {
-        HOME("home");
-
-        public final String id;
-
-        Client(String id) {
-            this.id = id;
-        }
-    }
-
-    public static final MainThreadInitializedObject<PredictionUiStateManager> INSTANCE =
-            new MainThreadInitializedObject<>(PredictionUiStateManager::new);
-
-    private final Context mContext;
-
-    private final DynamicItemCache mDynamicItemCache;
-    private List mPredictionServicePredictions = Collections.emptyList();
-
-    private int mMaxIconsPerRow;
-
-    private AllAppsContainerView mAppsView;
-
-    private PredictionState mPendingState;
-    private PredictionState mCurrentState;
-
-    private boolean mGettingValidPredictionResults;
-
-    private PredictionUiStateManager(Context context) {
-        mContext = context;
-
-        mDynamicItemCache = new DynamicItemCache(context, this::onAppsUpdated);
-
-        InvariantDeviceProfile idp = LauncherAppState.getIDP(context);
-        mMaxIconsPerRow = idp.numColumns;
-
-        idp.addOnChangeListener(this);
-        mGettingValidPredictionResults = Utilities.getDevicePrefs(context)
-                .getBoolean(LAST_PREDICTION_ENABLED_STATE, true);
-
-        // Call this last
-        mCurrentState = parseLastState();
-    }
-
-    @Override
-    public void onIdpChanged(int changeFlags, InvariantDeviceProfile profile) {
-        mMaxIconsPerRow = profile.numColumns;
-    }
-
-    public void setTargetAppsView(AllAppsContainerView appsView) {
-        if (mAppsView != null) {
-            mAppsView.getAppsStore().removeUpdateListener(this);
-        }
-        mAppsView = appsView;
-        if (mAppsView != null) {
-            mAppsView.getAppsStore().addUpdateListener(this);
-        }
-        if (mPendingState != null) {
-            applyState(mPendingState);
-            mPendingState = null;
-        } else {
-            applyState(mCurrentState);
-        }
-        updateDependencies(mCurrentState);
-    }
-
-    @Override
-    public void reapplyItemInfo(ItemInfoWithIcon info) { }
-
-    @Override
-    public void onStateTransitionComplete(LauncherState state) {
-        if (mAppsView == null) {
-            return;
-        }
-        if (mPendingState != null && canApplyPredictions(mPendingState)) {
-            applyState(mPendingState);
-            mPendingState = null;
-        }
-        if (mPendingState == null) {
-            Launcher.getLauncher(mAppsView.getContext()).getStateManager()
-                    .removeStateListener(this);
-        }
-    }
-
-    private void scheduleApplyPredictedApps(PredictionState state) {
-        boolean registerListener = mPendingState == null;
-        mPendingState = state;
-        if (registerListener) {
-            // Add a listener and wait until appsView is invisible again.
-            Launcher.getLauncher(mAppsView.getContext()).getStateManager().addStateListener(this);
-        }
-    }
-
-    private void applyState(PredictionState state) {
-        mCurrentState = state;
-        if (mAppsView != null) {
-            mAppsView.getFloatingHeaderView().findFixedRowByType(PredictionRowView.class)
-                    .setPredictedApps(mCurrentState.apps);
-        }
-    }
-
-    private void updatePredictionStateAfterCallback() {
-        boolean validResults = mPredictionServicePredictions != null
-                && !mPredictionServicePredictions.isEmpty();
-        if (validResults != mGettingValidPredictionResults) {
-            mGettingValidPredictionResults = validResults;
-            Utilities.getDevicePrefs(mContext).edit()
-                    .putBoolean(LAST_PREDICTION_ENABLED_STATE, true)
-                    .apply();
-        }
-        dispatchOnChange(true);
-    }
-
-    public AppPredictor.Callback appPredictorCallback(Client client) {
-        return targets -> {
-            mPredictionServicePredictions = targets;
-            updatePredictionStateAfterCallback();
-        };
-    }
-
-    private void dispatchOnChange(boolean changed) {
-        PredictionState newState = changed
-                ? parseLastState()
-                : mPendingState != null && canApplyPredictions(mPendingState)
-                        ? mPendingState
-                        : mCurrentState;
-        if (changed && mAppsView != null && !canApplyPredictions(newState)) {
-            scheduleApplyPredictedApps(newState);
-        } else {
-            applyState(newState);
-        }
-    }
-
-    private PredictionState parseLastState() {
-        PredictionState state = new PredictionState();
-        state.isEnabled = mGettingValidPredictionResults;
-        if (!state.isEnabled) {
-            state.apps = Collections.EMPTY_LIST;
-            return state;
-        }
-
-        state.apps = new ArrayList<>();
-
-        List<AppTarget> appTargets = mPredictionServicePredictions;
-        if (!appTargets.isEmpty()) {
-            for (AppTarget appTarget : appTargets) {
-                ComponentKey key;
-                if (appTarget.getShortcutInfo() != null) {
-                    key = ShortcutKey.fromInfo(appTarget.getShortcutInfo());
-                } else {
-                    key = new ComponentKey(new ComponentName(appTarget.getPackageName(),
-                            appTarget.getClassName()), appTarget.getUser());
-                }
-                state.apps.add(new ComponentKeyMapper(key, mDynamicItemCache));
-            }
-        }
-        updateDependencies(state);
-        return state;
-    }
-
-    private void updateDependencies(PredictionState state) {
-        if (!state.isEnabled || mAppsView == null) {
-            return;
-        }
-        mDynamicItemCache.updateDependencies(state.apps, mAppsView.getAppsStore(), this,
-                mMaxIconsPerRow);
-    }
-
-    @Override
-    public void onAppsUpdated() {
-        dispatchOnChange(false);
-    }
-
-    private boolean canApplyPredictions(PredictionState newState) {
-        if (mAppsView == null) {
-            // If there is no apps view, no need to schedule.
-            return true;
-        }
-        Launcher launcher = Launcher.getLauncher(mAppsView.getContext());
-        PredictionRowView predictionRow = mAppsView.getFloatingHeaderView().
-                findFixedRowByType(PredictionRowView.class);
-        if (!predictionRow.isShown() || predictionRow.getAlpha() == 0 ||
-                launcher.isForceInvisible()) {
-            return true;
-        }
-
-        if (mCurrentState.isEnabled != newState.isEnabled
-                || mCurrentState.apps.isEmpty() != newState.apps.isEmpty()) {
-            // If the visibility of the prediction row is changing, apply immediately.
-            return true;
-        }
-
-        if (launcher.getDeviceProfile().isVerticalBarLayout()) {
-            // If we are here & mAppsView.isShown() = true, we are probably in all-apps or mid way
-            return false;
-        }
-        if (!launcher.isInState(OVERVIEW) && !launcher.isInState(BACKGROUND_APP)) {
-            // Just a fallback as we dont need to apply instantly, if we are not in the swipe-up UI
-            return false;
-        }
-
-        // Instead of checking against 1, we should check against (1 + delta), where delta accounts
-        // for the nav-bar height (as app icon can still be visible under the nav-bar). Checking
-        // against 1, keeps the logic simple :)
-        return launcher.getAllAppsController().getProgress() > 1;
-    }
-
-    public PredictionState getCurrentState() {
-        return mCurrentState;
-    }
-
-    /**
-     * Returns ranking info for the app within all apps prediction.
-     * Only applicable when {@link ItemInfo#itemType} is one of the followings:
-     * {@link LauncherSettings.Favorites#ITEM_TYPE_APPLICATION},
-     * {@link LauncherSettings.Favorites#ITEM_TYPE_SHORTCUT},
-     * {@link LauncherSettings.Favorites#ITEM_TYPE_DEEP_SHORTCUT}
-     */
-    public OptionalInt getAllAppsRank(@Nullable ItemInfo itemInfo) {
-        if (itemInfo == null || itemInfo.getTargetComponent() == null || itemInfo.user == null) {
-            return OptionalInt.empty();
-        }
-
-        if (itemInfo.itemType == ITEM_TYPE_APPLICATION
-                || itemInfo.itemType == ITEM_TYPE_SHORTCUT
-                || itemInfo.itemType == ITEM_TYPE_DEEP_SHORTCUT) {
-            ComponentKey key = new ComponentKey(itemInfo.getTargetComponent(),
-                    itemInfo.user);
-            final List<ComponentKeyMapper> apps = getCurrentState().apps;
-            return IntStream.range(0, apps.size())
-                    .filter(index -> key.equals(apps.get(index).getComponentKey()))
-                    .findFirst();
-        }
-
-        return OptionalInt.empty();
-    }
-
-    /**
-     * Fill in predicted_rank field based on app prediction.
-     * Only applicable when {@link ItemInfo#itemType} is one of the followings:
-     * {@link LauncherSettings.Favorites#ITEM_TYPE_APPLICATION},
-     * {@link LauncherSettings.Favorites#ITEM_TYPE_SHORTCUT},
-     * {@link LauncherSettings.Favorites#ITEM_TYPE_DEEP_SHORTCUT}
-     */
-    public static void fillInPredictedRank(
-            @NonNull ItemInfo itemInfo, @NonNull LauncherLogProto.Target target) {
-
-        final PredictionUiStateManager manager = PredictionUiStateManager.INSTANCE.getNoCreate();
-        if (manager == null || itemInfo.getTargetComponent() == null || itemInfo.user == null
-                || (itemInfo.itemType != LauncherSettings.Favorites.ITEM_TYPE_APPLICATION
-                && itemInfo.itemType != LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT
-                && itemInfo.itemType != LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT)) {
-            return;
-        }
-        if (itemInfo.container != LauncherSettings.Favorites.CONTAINER_PREDICTION) {
-            HotseatPredictionController.encodeHotseatLayoutIntoPredictionRank(itemInfo, target);
-            return;
-        }
-
-        final ComponentKey k = new ComponentKey(itemInfo.getTargetComponent(), itemInfo.user);
-        final List<ComponentKeyMapper> predictedApps = manager.getCurrentState().apps;
-        IntStream.range(0, predictedApps.size())
-                .filter((i) -> k.equals(predictedApps.get(i).getComponentKey()))
-                .findFirst()
-                .ifPresent((rank) -> target.predictedRank = 0 - rank);
-    }
-
-    public static class PredictionState {
-
-        public boolean isEnabled;
-        public List<ComponentKeyMapper> apps;
-    }
-}
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionAppTracker.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/model/AppEventProducer.java
similarity index 64%
rename from quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionAppTracker.java
rename to quickstep/recents_ui_overrides/src/com/android/launcher3/model/AppEventProducer.java
index 8cabe3d..8e4c43f 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/appprediction/PredictionAppTracker.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/model/AppEventProducer.java
@@ -13,175 +13,76 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-package com.android.launcher3.appprediction;
+package com.android.launcher3.model;
 
-import static com.android.launcher3.InvariantDeviceProfile.CHANGE_FLAG_GRID;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_APP_LAUNCH_TAP;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_ITEM_DROPPED_ON_DONT_SUGGEST;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_QUICKSWITCH_LEFT;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_QUICKSWITCH_RIGHT;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_TASK_LAUNCH_SWIPE_DOWN;
 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_TASK_LAUNCH_TAP;
-import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
+import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
 
 import android.annotation.TargetApi;
-import android.app.prediction.AppPredictionContext;
-import android.app.prediction.AppPredictionManager;
-import android.app.prediction.AppPredictor;
 import android.app.prediction.AppTarget;
 import android.app.prediction.AppTargetEvent;
 import android.app.prediction.AppTargetId;
 import android.content.ComponentName;
 import android.content.Context;
 import android.os.Build;
-import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.os.Process;
 import android.os.SystemClock;
 import android.os.UserHandle;
 import android.text.TextUtils;
-import android.util.Log;
 
 import androidx.annotation.AnyThread;
 import androidx.annotation.Nullable;
-import androidx.annotation.UiThread;
 import androidx.annotation.WorkerThread;
 
-import com.android.launcher3.InvariantDeviceProfile;
-import com.android.launcher3.appprediction.PredictionUiStateManager.Client;
 import com.android.launcher3.logger.LauncherAtom;
 import com.android.launcher3.logger.LauncherAtom.ContainerInfo;
 import com.android.launcher3.logger.LauncherAtom.FolderContainer;
 import com.android.launcher3.logger.LauncherAtom.HotseatContainer;
 import com.android.launcher3.logger.LauncherAtom.WorkspaceContainer;
 import com.android.launcher3.logging.StatsLogManager.EventEnum;
-import com.android.launcher3.model.AppLaunchTracker;
 import com.android.launcher3.pm.UserCache;
-import com.android.quickstep.logging.StatsLogCompatManager;
 import com.android.quickstep.logging.StatsLogCompatManager.StatsLogConsumer;
 
 import java.util.Locale;
+import java.util.function.Consumer;
 import java.util.function.Predicate;
 
 /**
- * Subclass of app tracker which publishes the data to the prediction engine and gets back results.
+ * Utility class to track stats log and emit corresponding app events
  */
-@TargetApi(Build.VERSION_CODES.Q)
-public class PredictionAppTracker extends AppLaunchTracker implements StatsLogConsumer {
+@TargetApi(Build.VERSION_CODES.R)
+public class AppEventProducer implements StatsLogConsumer {
 
-    private static final String TAG = "PredictionAppTracker";
-    private static final boolean DBG = false;
+    private static final int MSG_LAUNCH = 0;
 
-    private static final int MSG_INIT = 0;
-    private static final int MSG_DESTROY = 1;
-    private static final int MSG_LAUNCH = 2;
-    private static final int MSG_PREDICT = 3;
-
-    protected final Context mContext;
+    private final Context mContext;
     private final Handler mMessageHandler;
+    private final Consumer<AppTargetEvent> mCallback;
 
-    // Accessed only on worker thread
-    private AppPredictor mHomeAppPredictor;
-
-    public PredictionAppTracker(Context context) {
+    public AppEventProducer(Context context, Consumer<AppTargetEvent> callback) {
         mContext = context;
-        mMessageHandler = new Handler(UI_HELPER_EXECUTOR.getLooper(), this::handleMessage);
-        InvariantDeviceProfile.INSTANCE.get(mContext).addOnChangeListener(this::onIdpChanged);
-
-        mMessageHandler.sendEmptyMessage(MSG_INIT);
-    }
-
-    @UiThread
-    private void onIdpChanged(int changeFlags, InvariantDeviceProfile profile) {
-        if ((changeFlags & CHANGE_FLAG_GRID) != 0) {
-            // Reinitialize everything
-            mMessageHandler.sendEmptyMessage(MSG_INIT);
-        }
-    }
-
-    @WorkerThread
-    private void destroy() {
-        if (mHomeAppPredictor != null) {
-            mHomeAppPredictor.destroy();
-            mHomeAppPredictor = null;
-        }
-        StatsLogCompatManager.LOGS_CONSUMER.remove(this);
-    }
-
-    @WorkerThread
-    private AppPredictor createPredictor(Client client, int count) {
-        AppPredictionManager apm = mContext.getSystemService(AppPredictionManager.class);
-
-        if (apm == null) {
-            return null;
-        }
-
-        AppPredictor predictor = apm.createAppPredictionSession(
-                new AppPredictionContext.Builder(mContext)
-                        .setUiSurface(client.id)
-                        .setPredictedTargetCount(count)
-                        .setExtras(getAppPredictionContextExtras(client))
-                        .build());
-        predictor.registerPredictionUpdates(mContext.getMainExecutor(),
-                PredictionUiStateManager.INSTANCE.get(mContext).appPredictorCallback(client));
-        predictor.requestPredictionUpdate();
-        return predictor;
-    }
-
-    /**
-     * Override to add custom extras.
-     */
-    @WorkerThread
-    @Nullable
-    public Bundle getAppPredictionContextExtras(Client client) {
-        return null;
+        mMessageHandler = new Handler(MODEL_EXECUTOR.getLooper(), this::handleMessage);
+        mCallback = callback;
     }
 
     @WorkerThread
     private boolean handleMessage(Message msg) {
         switch (msg.what) {
-            case MSG_INIT: {
-                // Destroy any existing clients
-                destroy();
-
-                // Initialize the clients
-                int count = InvariantDeviceProfile.INSTANCE.get(mContext).numAllAppsColumns;
-                mHomeAppPredictor = createPredictor(Client.HOME, count);
-                StatsLogCompatManager.LOGS_CONSUMER.add(this);
-                return true;
-            }
-            case MSG_DESTROY: {
-                destroy();
-                return true;
-            }
             case MSG_LAUNCH: {
-                if (mHomeAppPredictor != null) {
-                    mHomeAppPredictor.notifyAppTargetEvent((AppTargetEvent) msg.obj);
-                }
-                return true;
-            }
-            case MSG_PREDICT: {
-                if (mHomeAppPredictor != null) {
-                    mHomeAppPredictor.requestPredictionUpdate();
-                }
+                mCallback.accept((AppTargetEvent) msg.obj);
                 return true;
             }
         }
         return false;
     }
 
-    @Override
-    @UiThread
-    public void onReturnedToHome() {
-        String client = Client.HOME.id;
-        mMessageHandler.removeMessages(MSG_PREDICT, client);
-        Message.obtain(mMessageHandler, MSG_PREDICT, client).sendToTarget();
-        if (DBG) {
-            Log.d(TAG, String.format("Sent immediate message to update %s", client));
-        }
-    }
-
     @AnyThread
     private void sendEvent(LauncherAtom.ItemInfo atomInfo, int eventId) {
         AppTarget target = toAppTarget(atomInfo);
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/model/PredictionUpdateTask.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/model/PredictionUpdateTask.java
new file mode 100644
index 0000000..721e2be
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/model/PredictionUpdateTask.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.model;
+
+import static com.android.launcher3.LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT;
+import static com.android.launcher3.model.QuickstepModelDelegate.LAST_PREDICTION_ENABLED_STATE;
+import static com.android.quickstep.InstantAppResolverImpl.COMPONENT_CLASS_MARKER;
+
+import android.app.prediction.AppTarget;
+import android.content.ComponentName;
+import android.content.pm.LauncherActivityInfo;
+import android.content.pm.LauncherApps;
+import android.content.pm.ShortcutInfo;
+import android.os.UserHandle;
+
+import com.android.launcher3.LauncherAppState;
+import com.android.launcher3.Utilities;
+import com.android.launcher3.model.BgDataModel.FixedContainerItems;
+import com.android.launcher3.model.data.AppInfo;
+import com.android.launcher3.model.data.WorkspaceItemInfo;
+
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+/**
+ * Task to update model as a result of predicted apps update
+ */
+public class PredictionUpdateTask extends BaseModelUpdateTask {
+
+    private final List<AppTarget> mTargets;
+    private final int mContainerId;
+
+    PredictionUpdateTask(int containerId, List<AppTarget> targets) {
+        mContainerId = containerId;
+        mTargets = targets;
+    }
+
+    @Override
+    public void execute(LauncherAppState app, BgDataModel dataModel, AllAppsList apps) {
+        // TODO: persist the whole list
+        Utilities.getDevicePrefs(app.getContext()).edit()
+                .putBoolean(LAST_PREDICTION_ENABLED_STATE, !mTargets.isEmpty()).apply();
+
+        FixedContainerItems fci;
+        synchronized (dataModel) {
+            fci = dataModel.extraItems.get(mContainerId);
+            if (fci == null) {
+                return;
+            }
+        }
+
+        Set<UserHandle> usersForChangedShortcuts = new HashSet<>(fci.items.stream()
+                .filter(info -> info.itemType == ITEM_TYPE_DEEP_SHORTCUT)
+                .map(info -> info.user)
+                .collect(Collectors.toSet()));
+        fci.items.clear();
+
+        for (AppTarget target : mTargets) {
+            WorkspaceItemInfo itemInfo;
+            ShortcutInfo si = target.getShortcutInfo();
+            if (si != null) {
+                usersForChangedShortcuts.add(si.getUserHandle());
+                itemInfo = new WorkspaceItemInfo(si, app.getContext());
+                app.getIconCache().getShortcutIcon(itemInfo, si);
+            } else {
+                String className = target.getClassName();
+                if (COMPONENT_CLASS_MARKER.equals(className)) {
+                    // TODO: Implement this
+                    continue;
+                }
+                ComponentName cn = new ComponentName(target.getPackageName(), className);
+                UserHandle user = target.getUser();
+                itemInfo = apps.data.stream()
+                        .filter(info -> user.equals(info.user) && cn.equals(info.componentName))
+                        .map(AppInfo::makeWorkspaceItem)
+                        .findAny()
+                        .orElseGet(() -> {
+                            LauncherActivityInfo lai = app.getContext()
+                                    .getSystemService(LauncherApps.class)
+                                    .resolveActivity(AppInfo.makeLaunchIntent(cn), user);
+                            if (lai == null) {
+                                return null;
+                            }
+                            AppInfo ai = new AppInfo(app.getContext(), lai, user);
+                            app.getIconCache().getTitleAndIcon(ai, lai, false);
+                            return ai.makeWorkspaceItem();
+                        });
+
+                if (itemInfo == null) {
+                    continue;
+                }
+            }
+
+            itemInfo.container = mContainerId;
+            fci.items.add(itemInfo);
+        }
+
+        bindExtraContainerItems(fci);
+        usersForChangedShortcuts.forEach(
+                u -> dataModel.updateShortcutPinnedState(app.getContext(), u));
+    }
+}
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/model/QuickstepModelDelegate.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/model/QuickstepModelDelegate.java
new file mode 100644
index 0000000..b516469
--- /dev/null
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/model/QuickstepModelDelegate.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.model;
+
+import static com.android.launcher3.InvariantDeviceProfile.CHANGE_FLAG_GRID;
+import static com.android.launcher3.LauncherSettings.Favorites.CONTAINER_PREDICTION;
+
+import android.app.prediction.AppPredictionContext;
+import android.app.prediction.AppPredictionManager;
+import android.app.prediction.AppPredictor;
+import android.app.prediction.AppTarget;
+import android.app.prediction.AppTargetEvent;
+import android.content.Context;
+
+import androidx.annotation.WorkerThread;
+
+import com.android.launcher3.InvariantDeviceProfile;
+import com.android.launcher3.InvariantDeviceProfile.OnIDPChangeListener;
+import com.android.launcher3.model.BgDataModel.FixedContainerItems;
+import com.android.launcher3.util.Executors;
+import com.android.quickstep.logging.StatsLogCompatManager;
+
+import java.util.List;
+
+/**
+ * Model delegate which loads prediction items
+ */
+public class QuickstepModelDelegate extends ModelDelegate implements OnIDPChangeListener {
+
+    public static final String LAST_PREDICTION_ENABLED_STATE = "last_prediction_enabled_state";
+
+    private final InvariantDeviceProfile mIDP;
+    private final AppEventProducer mAppEventProducer;
+
+    private AppPredictor mAllAppsPredictor;
+    private boolean mActive = false;
+
+    public QuickstepModelDelegate(Context context) {
+        mAppEventProducer = new AppEventProducer(context, this::onAppTargetEvent);
+
+        mIDP = InvariantDeviceProfile.INSTANCE.get(context);
+        mIDP.addOnChangeListener(this);
+        StatsLogCompatManager.LOGS_CONSUMER.add(mAppEventProducer);
+    }
+
+    @Override
+    public void loadItems() {
+        // TODO: Implement caching and preloading
+        super.loadItems();
+        mDataModel.extraItems.put(
+                CONTAINER_PREDICTION, new FixedContainerItems(CONTAINER_PREDICTION));
+
+        mActive = true;
+        recreatePredictors();
+    }
+
+    @Override
+    public void validateData() {
+        super.validateData();
+        if (mAllAppsPredictor != null) {
+            mAllAppsPredictor.requestPredictionUpdate();
+        }
+    }
+
+    @Override
+    public void destroy() {
+        super.destroy();
+        mActive = false;
+        StatsLogCompatManager.LOGS_CONSUMER.remove(mAppEventProducer);
+
+        destroyPredictors();
+        mIDP.removeOnChangeListener(this);
+    }
+
+    private void destroyPredictors() {
+        if (mAllAppsPredictor != null) {
+            mAllAppsPredictor.destroy();
+            mAllAppsPredictor = null;
+        }
+    }
+
+    @WorkerThread
+    private void recreatePredictors() {
+        destroyPredictors();
+        if (!mActive) {
+            return;
+        }
+
+        Context context = mApp.getContext();
+        AppPredictionManager apm = context.getSystemService(AppPredictionManager.class);
+        if (apm == null) {
+            return;
+        }
+
+        int count = mIDP.numAllAppsColumns;
+
+        mAllAppsPredictor = apm.createAppPredictionSession(
+                new AppPredictionContext.Builder(context)
+                        .setUiSurface("home")
+                        .setPredictedTargetCount(count)
+                        .build());
+        mAllAppsPredictor.registerPredictionUpdates(
+                Executors.MODEL_EXECUTOR, this::onAllAppsPredictionChanged);
+        mAllAppsPredictor.requestPredictionUpdate();
+    }
+
+    private void onAllAppsPredictionChanged(List<AppTarget> targets) {
+        mApp.getModel().enqueueModelUpdateTask(
+                new PredictionUpdateTask(CONTAINER_PREDICTION, targets));
+    }
+
+    @Override
+    public void onIdpChanged(int changeFlags, InvariantDeviceProfile profile) {
+        if ((changeFlags & CHANGE_FLAG_GRID) != 0) {
+            // Reinitialize everything
+            Executors.MODEL_EXECUTOR.execute(this::recreatePredictors);
+        }
+    }
+
+    private void onAppTargetEvent(AppTargetEvent event) {
+        if (mAllAppsPredictor != null) {
+            mAllAppsPredictor.notifyAppTargetEvent(event);
+        }
+    }
+}
diff --git a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/QuickstepLauncher.java b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
index beb2a6a..43dba85 100644
--- a/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
+++ b/quickstep/recents_ui_overrides/src/com/android/launcher3/uioverrides/QuickstepLauncher.java
@@ -17,6 +17,9 @@
 
 import static android.view.accessibility.AccessibilityEvent.TYPE_VIEW_FOCUSED;
 
+import static com.android.launcher3.LauncherSettings.Favorites.ITEM_TYPE_APPLICATION;
+import static com.android.launcher3.LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT;
+import static com.android.launcher3.LauncherSettings.Favorites.ITEM_TYPE_SHORTCUT;
 import static com.android.launcher3.LauncherState.NORMAL;
 import static com.android.launcher3.LauncherState.OVERVIEW;
 import static com.android.launcher3.LauncherState.OVERVIEW_MODAL_TASK;
@@ -37,16 +40,18 @@
 import com.android.launcher3.BaseQuickstepLauncher;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.Workspace;
 import com.android.launcher3.allapps.DiscoveryBounce;
 import com.android.launcher3.anim.AnimatorPlaybackController;
-import com.android.launcher3.appprediction.PredictionUiStateManager;
+import com.android.launcher3.appprediction.PredictionRowView;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.folder.Folder;
 import com.android.launcher3.hybridhotseat.HotseatPredictionController;
 import com.android.launcher3.logging.InstanceId;
 import com.android.launcher3.logging.StatsLogManager.StatsLogger;
+import com.android.launcher3.model.BgDataModel.FixedContainerItems;
 import com.android.launcher3.model.data.AppInfo;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.model.data.WorkspaceItemInfo;
@@ -79,7 +84,7 @@
 import java.io.PrintWriter;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.OptionalInt;
+import java.util.Objects;
 import java.util.stream.Stream;
 
 public class QuickstepLauncher extends BaseQuickstepLauncher {
@@ -91,6 +96,8 @@
     public static final AsyncCommand SET_SHELF_HEIGHT = (context, arg1, arg2) ->
             SystemUiProxy.INSTANCE.get(context).setShelfHeight(arg1 != 0, arg2);
 
+    private FixedContainerItems mAllAppsPredictions;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -111,8 +118,23 @@
     protected void logAppLaunch(ItemInfo info, InstanceId instanceId) {
         StatsLogger logger = getStatsLogManager()
                 .logger().withItemInfo(info).withInstanceId(instanceId);
-        OptionalInt allAppsRank = PredictionUiStateManager.INSTANCE.get(this).getAllAppsRank(info);
-        allAppsRank.ifPresent(logger::withRank);
+
+        if (mAllAppsPredictions != null
+                && (info.itemType == ITEM_TYPE_APPLICATION
+                || info.itemType == ITEM_TYPE_SHORTCUT
+                || info.itemType == ITEM_TYPE_DEEP_SHORTCUT)) {
+            int count = mAllAppsPredictions.items.size();
+            for (int i = 0; i < count; i++) {
+                ItemInfo targetInfo = mAllAppsPredictions.items.get(i);
+                if (targetInfo.itemType == info.itemType
+                        && targetInfo.user.equals(info.user)
+                        && Objects.equals(targetInfo.getIntent(), info.getIntent())) {
+                    logger.withRank(i);
+                    break;
+                }
+
+            }
+        }
         logger.log(LAUNCHER_APP_LAUNCH_TAP);
 
         if (mHotseatPredictionController != null) {
@@ -200,6 +222,15 @@
     }
 
     @Override
+    public void bindExtraContainerItems(FixedContainerItems item) {
+        if (item.containerId == Favorites.CONTAINER_PREDICTION) {
+            mAllAppsPredictions = item;
+            getAppsView().getFloatingHeaderView().findFixedRowByType(PredictionRowView.class)
+                    .setPredictedApps(item.items);
+        }
+    }
+
+    @Override
     public void onDestroy() {
         super.onDestroy();
         if (mHotseatPredictionController != null) {
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/AbsSwipeUpHandler.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/AbsSwipeUpHandler.java
index 5a3449b..f371145 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/AbsSwipeUpHandler.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/AbsSwipeUpHandler.java
@@ -1172,7 +1172,6 @@
         anim.addAnimatorListener(new AnimationSuccessListener() {
             @Override
             public void onAnimationStart(Animator animation) {
-                super.onAnimationStart(animation);
                 if (mActivity != null) {
                     removeLiveTileOverlay();
                 }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityInterface.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityInterface.java
index b020355..5a35eb5 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityInterface.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/LauncherActivityInterface.java
@@ -41,7 +41,6 @@
 import com.android.launcher3.allapps.DiscoveryBounce;
 import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.anim.PendingAnimation;
-import com.android.launcher3.appprediction.PredictionUiStateManager;
 import com.android.launcher3.statehandlers.DepthController;
 import com.android.launcher3.statehandlers.DepthController.ClampedDepthProperty;
 import com.android.launcher3.statemanager.StateManager;
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeUpAnimationLogic.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeUpAnimationLogic.java
index 07faab7..e54a21c 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeUpAnimationLogic.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/SwipeUpAnimationLogic.java
@@ -287,7 +287,6 @@
 
         @Override
         public void onAnimationStart(Animator animation) {
-            super.onAnimationStart(animation);
             mHomeAnim.dispatchOnStart();
         }
 
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/logging/UserEventDispatcherAppPredictionExtension.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/logging/UserEventDispatcherAppPredictionExtension.java
deleted file mode 100644
index e000803..0000000
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/logging/UserEventDispatcherAppPredictionExtension.java
+++ /dev/null
@@ -1,49 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.quickstep.logging;
-
-import android.content.Context;
-
-import androidx.annotation.NonNull;
-
-import com.android.launcher3.appprediction.PredictionUiStateManager;
-import com.android.launcher3.model.data.ItemInfo;
-import com.android.launcher3.userevent.nano.LauncherLogProto;
-
-import java.util.ArrayList;
-
-/**
- * This class handles AOSP MetricsLogger function calls and logging around
- * quickstep interactions and app launches.
- */
-@SuppressWarnings("unused")
-public class UserEventDispatcherAppPredictionExtension extends UserEventDispatcherExtension {
-
-    public static final int ALL_APPS_PREDICTION_TIPS = 2;
-
-    private static final String TAG = "UserEventDispatcher";
-
-    public UserEventDispatcherAppPredictionExtension(Context context) {
-        super(context);
-    }
-
-    @Override
-    protected void onFillInLogContainerData(
-            @NonNull ItemInfo itemInfo, @NonNull LauncherLogProto.Target target,
-            @NonNull ArrayList<LauncherLogProto.Target> targets) {
-        PredictionUiStateManager.fillInPredictedRank(itemInfo, target);
-    }
-}
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskMenuView.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskMenuView.java
index 9b2048e..8b49f2c 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskMenuView.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/views/TaskMenuView.java
@@ -282,7 +282,6 @@
         mOpenCloseAnimator.addListener(new AnimationSuccessListener() {
             @Override
             public void onAnimationStart(Animator animation) {
-                super.onAnimationStart(animation);
                 setVisibility(VISIBLE);
             }
 
diff --git a/quickstep/tests/src/com/android/quickstep/AppPredictionsUITests.java b/quickstep/tests/src/com/android/quickstep/AppPredictionsUITests.java
deleted file mode 100644
index 5904fcd..0000000
--- a/quickstep/tests/src/com/android/quickstep/AppPredictionsUITests.java
+++ /dev/null
@@ -1,162 +0,0 @@
-/**
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
-
-package com.android.quickstep;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-
-import android.app.prediction.AppPredictor;
-import android.app.prediction.AppTarget;
-import android.app.prediction.AppTargetId;
-import android.content.ComponentName;
-import android.content.pm.LauncherActivityInfo;
-import android.content.pm.LauncherApps;
-import android.os.Process;
-import android.view.View;
-
-import androidx.test.filters.LargeTest;
-import androidx.test.runner.AndroidJUnit4;
-
-import com.android.launcher3.BubbleTextView;
-import com.android.launcher3.Launcher;
-import com.android.launcher3.appprediction.PredictionRowView;
-import com.android.launcher3.appprediction.PredictionUiStateManager;
-import com.android.launcher3.appprediction.PredictionUiStateManager.Client;
-import com.android.launcher3.model.AppLaunchTracker;
-
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import java.util.ArrayList;
-import java.util.List;
-
-@LargeTest
-@RunWith(AndroidJUnit4.class)
-public class AppPredictionsUITests extends AbstractQuickStepTest {
-
-    private LauncherActivityInfo mSampleApp1;
-    private LauncherActivityInfo mSampleApp2;
-    private LauncherActivityInfo mSampleApp3;
-
-    private AppPredictor.Callback mCallback;
-
-    @Before
-    public void setUp() throws Exception {
-        super.setUp();
-
-        List<LauncherActivityInfo> activities = mTargetContext.getSystemService(LauncherApps.class)
-                .getActivityList(null, Process.myUserHandle());
-        mSampleApp1 = activities.get(0);
-        mSampleApp2 = activities.get(1);
-        mSampleApp3 = activities.get(2);
-
-        // Disable app tracker
-        AppLaunchTracker.INSTANCE.initializeForTesting(new AppLaunchTracker());
-        PredictionUiStateManager.INSTANCE.initializeForTesting(null);
-
-        mCallback = PredictionUiStateManager.INSTANCE.get(mTargetContext).appPredictorCallback(
-                Client.HOME);
-
-        mDevice.setOrientationNatural();
-    }
-
-    @After
-    public void tearDown() throws Throwable {
-        AppLaunchTracker.INSTANCE.initializeForTesting(null);
-        PredictionUiStateManager.INSTANCE.initializeForTesting(null);
-        mDevice.unfreezeRotation();
-    }
-
-    /**
-     * Test that prediction UI is updated as soon as we get predictions from the system
-     */
-    @Test
-    public void testPredictionExistsInAllApps() {
-        mLauncher.pressHome().switchToAllApps();
-
-        // Dispatch an update
-        sendPredictionUpdate(mSampleApp1, mSampleApp2);
-        // The first update should apply immediately.
-        waitForLauncherCondition("Predictions were not updated in loading state",
-                launcher -> getPredictedApp(launcher).size() == 2);
-    }
-
-    /**
-     * Test that prediction update is deferred if it is already visible
-     */
-    @Test
-    public void testPredictionsDeferredUntilHome() {
-        mDevice.pressHome();
-        sendPredictionUpdate(mSampleApp1, mSampleApp2);
-        mLauncher.pressHome().switchToAllApps();
-        waitForLauncherCondition("Predictions were not updated in loading state",
-                launcher -> getPredictedApp(launcher).size() == 2);
-
-        // Update predictions while all-apps is visible
-        sendPredictionUpdate(mSampleApp1, mSampleApp2, mSampleApp3);
-        assertEquals(2, getFromLauncher(this::getPredictedApp).size());
-
-        // Go home and go back to all-apps
-        mLauncher.pressHome().switchToAllApps();
-        assertEquals(3, getFromLauncher(this::getPredictedApp).size());
-    }
-
-    @Test
-    public void testPredictionsDisabled() {
-        mDevice.pressHome();
-        sendPredictionUpdate();
-        mLauncher.pressHome().switchToAllApps();
-
-        waitForLauncherCondition("Predictions were not updated in loading state",
-                launcher -> launcher.getAppsView().getFloatingHeaderView()
-                        .findFixedRowByType(PredictionRowView.class).getVisibility() == View.GONE);
-        assertFalse(PredictionUiStateManager.INSTANCE.get(mTargetContext)
-                .getCurrentState().isEnabled);
-    }
-
-    public ArrayList<BubbleTextView> getPredictedApp(Launcher launcher) {
-        PredictionRowView container = launcher.getAppsView().getFloatingHeaderView()
-                .findFixedRowByType(PredictionRowView.class);
-
-        ArrayList<BubbleTextView> predictedAppViews = new ArrayList<>();
-        for (int i = 0; i < container.getChildCount(); i++) {
-            View view = container.getChildAt(i);
-            if (view instanceof BubbleTextView && view.getVisibility() == View.VISIBLE) {
-                predictedAppViews.add((BubbleTextView) view);
-            }
-        }
-        return predictedAppViews;
-    }
-
-    private void sendPredictionUpdate(LauncherActivityInfo... activities) {
-        getOnUiThread(() -> {
-            List<AppTarget> targets = new ArrayList<>(activities.length);
-            for (LauncherActivityInfo info : activities) {
-                ComponentName cn = info.getComponentName();
-                AppTarget target = new AppTarget.Builder(
-                        new AppTargetId("app:" + cn), cn.getPackageName(), info.getUser())
-                        .setClassName(cn.getClassName())
-                        .build();
-                targets.add(target);
-            }
-            mCallback.onTargetsAvailable(targets);
-            return null;
-        });
-    }
-}
diff --git a/res/values/config.xml b/res/values/config.xml
index 75fcc90..dc8bdff 100644
--- a/res/values/config.xml
+++ b/res/values/config.xml
@@ -70,6 +70,7 @@
     <string name="test_information_handler_class" translatable="false"></string>
     <string name="launcher_activity_logic_class" translatable="false"></string>
     <string name="prediction_model_class" translatable="false"></string>
+    <string name="model_delegate_class" translatable="false"></string>
 
     <!-- View ID to use for QSB widget -->
     <item type="id" name="qsb_widget" />
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index f9fba6f..db1f1b0 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -119,7 +119,6 @@
 import com.android.launcher3.logging.FileLog;
 import com.android.launcher3.logging.StatsLogManager;
 import com.android.launcher3.logging.UserEventDispatcher;
-import com.android.launcher3.model.AppLaunchTracker;
 import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.model.ModelWriter;
 import com.android.launcher3.model.data.AppInfo;
@@ -911,14 +910,12 @@
         logStopAndResume(Action.Command.RESUME);
         getUserEventDispatcher().startSession();
 
-        AppLaunchTracker.INSTANCE.get(this).onReturnedToHome();
-
         // Process any items that were added while Launcher was away.
         InstallShortcutReceiver.disableAndFlushInstallQueue(
                 InstallShortcutReceiver.FLAG_ACTIVITY_PAUSED, this);
 
         // Refresh shortcuts if the permission changed.
-        mModel.refreshShortcutsIfRequired();
+        mModel.validateModelDataOnResume();
 
         // Set the notification listener and fetch updated notifications when we resume
         NotificationListener.setNotificationsChangedListener(mPopupDataProvider);
diff --git a/src/com/android/launcher3/LauncherAppState.java b/src/com/android/launcher3/LauncherAppState.java
index 53e5274..e3fe87d 100644
--- a/src/com/android/launcher3/LauncherAppState.java
+++ b/src/com/android/launcher3/LauncherAppState.java
@@ -128,7 +128,7 @@
         mInvariantDeviceProfile = InvariantDeviceProfile.INSTANCE.get(context);
         mIconCache = new IconCache(mContext, mInvariantDeviceProfile, iconCacheFileName);
         mWidgetCache = new WidgetPreviewLoader(mContext, mIconCache);
-        mModel = new LauncherModel(this, mIconCache, AppFilter.newInstance(mContext));
+        mModel = new LauncherModel(context, this, mIconCache, AppFilter.newInstance(mContext));
         mPredictionModel = PredictionModel.newInstance(mContext);
     }
 
@@ -157,6 +157,7 @@
      * Call from Application.onTerminate(), which is not guaranteed to ever be called.
      */
     public void onTerminate() {
+        mModel.destroy();
         if (mModelChangeReceiver != null) {
             mContext.unregisterReceiver(mModelChangeReceiver);
         }
diff --git a/src/com/android/launcher3/LauncherModel.java b/src/com/android/launcher3/LauncherModel.java
index ff4b545..e2568d5 100644
--- a/src/com/android/launcher3/LauncherModel.java
+++ b/src/com/android/launcher3/LauncherModel.java
@@ -20,7 +20,6 @@
 import static com.android.launcher3.config.FeatureFlags.IS_STUDIO_BUILD;
 import static com.android.launcher3.util.Executors.MAIN_EXECUTOR;
 import static com.android.launcher3.util.Executors.MODEL_EXECUTOR;
-import static com.android.launcher3.util.PackageManagerHelper.hasShortcutsPermission;
 
 import android.content.Context;
 import android.content.Intent;
@@ -46,6 +45,7 @@
 import com.android.launcher3.model.CacheDataUpdatedTask;
 import com.android.launcher3.model.LoaderResults;
 import com.android.launcher3.model.LoaderTask;
+import com.android.launcher3.model.ModelDelegate;
 import com.android.launcher3.model.ModelWriter;
 import com.android.launcher3.model.PackageInstallStateChangedTask;
 import com.android.launcher3.model.PackageUpdatedTask;
@@ -112,20 +112,22 @@
      */
     private final BgDataModel mBgDataModel = new BgDataModel();
 
+    private final ModelDelegate mModelDelegate;
+
     // Runnable to check if the shortcuts permission has changed.
-    private final Runnable mShortcutPermissionCheckRunnable = new Runnable() {
+    private final Runnable mDataValidationCheck = new Runnable() {
         @Override
         public void run() {
-            if (mModelLoaded && hasShortcutsPermission(mApp.getContext())
-                    != mBgAllAppsList.hasShortcutHostPermission()) {
-                forceReload();
+            if (mModelLoaded) {
+                mModelDelegate.validateData();
             }
         }
     };
 
-    LauncherModel(LauncherAppState app, IconCache iconCache, AppFilter appFilter) {
+    LauncherModel(Context context, LauncherAppState app, IconCache iconCache, AppFilter appFilter) {
         mApp = app;
         mBgAllAppsList = new AllAppsList(iconCache, appFilter);
+        mModelDelegate = ModelDelegate.newInstance(context, app, mBgAllAppsList, mBgDataModel);
     }
 
     /**
@@ -217,6 +219,13 @@
         }
     }
 
+    /**
+     * Called when the model is destroyed
+     */
+    public void destroy() {
+        MODEL_EXECUTOR.execute(mModelDelegate::destroy);
+    }
+
     public void onBroadcastIntent(Intent intent) {
         if (DEBUG_RECEIVER) Log.d(TAG, "onReceive intent=" + intent);
         final String action = intent.getAction();
@@ -372,7 +381,8 @@
     public void startLoaderForResults(LoaderResults results) {
         synchronized (mLock) {
             stopLoader();
-            mLoaderTask = new LoaderTask(mApp, mBgAllAppsList, mBgDataModel, results);
+            mLoaderTask = new LoaderTask(
+                    mApp, mBgAllAppsList, mBgDataModel, mModelDelegate, results);
 
             // Always post the loader task, instead of running directly (even on same thread) so
             // that we exit any nested synchronized blocks
@@ -491,9 +501,9 @@
      * Current implementation simply reloads the workspace, but it can be optimized to
      * use partial updates similar to {@link UserCache}
      */
-    public void refreshShortcutsIfRequired() {
-        MODEL_EXECUTOR.getHandler().removeCallbacks(mShortcutPermissionCheckRunnable);
-        MODEL_EXECUTOR.post(mShortcutPermissionCheckRunnable);
+    public void validateModelDataOnResume() {
+        MODEL_EXECUTOR.getHandler().removeCallbacks(mDataValidationCheck);
+        MODEL_EXECUTOR.post(mDataValidationCheck);
     }
 
     /**
diff --git a/src/com/android/launcher3/anim/AlphaUpdateListener.java b/src/com/android/launcher3/anim/AlphaUpdateListener.java
index 69716ea..eabd283 100644
--- a/src/com/android/launcher3/anim/AlphaUpdateListener.java
+++ b/src/com/android/launcher3/anim/AlphaUpdateListener.java
@@ -46,8 +46,7 @@
     }
 
     @Override
-    public void onAnimationStart(Animator animation) {
-        super.onAnimationStart(animation);
+    public void onAnimationStart(Animator arg0) {
         // We want the views to be visible for animation, so fade-in/out is visible
         mView.setVisibility(View.VISIBLE);
     }
diff --git a/src/com/android/launcher3/anim/AnimationSuccessListener.java b/src/com/android/launcher3/anim/AnimationSuccessListener.java
index b83417c..9905e81 100644
--- a/src/com/android/launcher3/anim/AnimationSuccessListener.java
+++ b/src/com/android/launcher3/anim/AnimationSuccessListener.java
@@ -19,8 +19,6 @@
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 
-import androidx.annotation.CallSuper;
-
 /**
  * Extension of {@link AnimatorListenerAdapter} for listening for non-cancelled animations
  */
@@ -29,12 +27,6 @@
     protected boolean mCancelled = false;
 
     @Override
-    @CallSuper
-    public void onAnimationStart(Animator animation) {
-        mCancelled = false;
-    }
-
-    @Override
     public void onAnimationCancel(Animator animation) {
         mCancelled = true;
     }
diff --git a/src/com/android/launcher3/anim/AnimatorPlaybackController.java b/src/com/android/launcher3/anim/AnimatorPlaybackController.java
index 31e0418..ea0ff8b 100644
--- a/src/com/android/launcher3/anim/AnimatorPlaybackController.java
+++ b/src/com/android/launcher3/anim/AnimatorPlaybackController.java
@@ -335,7 +335,6 @@
 
         @Override
         public void onAnimationStart(Animator animation) {
-            super.onAnimationStart(animation);
             mCancelled = false;
             mDispatched = false;
         }
diff --git a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
index a424f84..d8eb838 100644
--- a/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
+++ b/src/com/android/launcher3/graphics/LauncherPreviewRenderer.java
@@ -74,6 +74,7 @@
 import com.android.launcher3.model.BgDataModel.Callbacks;
 import com.android.launcher3.model.LoaderResults;
 import com.android.launcher3.model.LoaderTask;
+import com.android.launcher3.model.ModelDelegate;
 import com.android.launcher3.model.WidgetItem;
 import com.android.launcher3.model.WidgetsModel;
 import com.android.launcher3.model.data.AppInfo;
@@ -579,7 +580,7 @@
         private final FutureTask<WorkspaceResult> mTask = new FutureTask<>(this);
 
         WorkspaceItemsInfoFromPreviewFetcher(LauncherAppState app) {
-            super(app, null, new BgDataModel(), null);
+            super(app, null, new BgDataModel(), new ModelDelegate(), null);
         }
 
         @Override
diff --git a/src/com/android/launcher3/model/AppLaunchTracker.java b/src/com/android/launcher3/model/AppLaunchTracker.java
deleted file mode 100644
index a93c0dd..0000000
--- a/src/com/android/launcher3/model/AppLaunchTracker.java
+++ /dev/null
@@ -1,33 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.launcher3.model;
-
-import static com.android.launcher3.util.MainThreadInitializedObject.forOverride;
-
-import com.android.launcher3.R;
-import com.android.launcher3.util.MainThreadInitializedObject;
-import com.android.launcher3.util.ResourceBasedOverride;
-
-/**
- * Callback for receiving various app launch events
- */
-public class AppLaunchTracker implements ResourceBasedOverride {
-
-    public static final MainThreadInitializedObject<AppLaunchTracker> INSTANCE =
-            forOverride(AppLaunchTracker.class, R.string.app_launch_tracker_class);
-
-    public void onReturnedToHome() { }
-}
diff --git a/src/com/android/launcher3/model/BgDataModel.java b/src/com/android/launcher3/model/BgDataModel.java
index dfdc138..6158a9c 100644
--- a/src/com/android/launcher3/model/BgDataModel.java
+++ b/src/com/android/launcher3/model/BgDataModel.java
@@ -109,13 +109,6 @@
     public final ArrayList<AppInfo> cachedPredictedItems = new ArrayList<>();
 
     /**
-     * @see Callbacks#FLAG_HAS_SHORTCUT_PERMISSION
-     * @see Callbacks#FLAG_QUIET_MODE_ENABLED
-     * @see Callbacks#FLAG_QUIET_MODE_CHANGE_PERMISSION
-     */
-    public int flags;
-
-    /**
      * Maps all launcher activities to counts of their shortcuts.
      */
     public final HashMap<ComponentKey, Integer> deepShortcutMap = new HashMap<>();
diff --git a/src/com/android/launcher3/model/LoaderTask.java b/src/com/android/launcher3/model/LoaderTask.java
index bea0086..b067909 100644
--- a/src/com/android/launcher3/model/LoaderTask.java
+++ b/src/com/android/launcher3/model/LoaderTask.java
@@ -109,6 +109,7 @@
     protected final LauncherAppState mApp;
     private final AllAppsList mBgAllAppsList;
     protected final BgDataModel mBgDataModel;
+    private final ModelDelegate mModelDelegate;
 
     private FirstScreenBroadcast mFirstScreenBroadcast;
 
@@ -128,10 +129,11 @@
     private boolean mStopped;
 
     public LoaderTask(LauncherAppState app, AllAppsList bgAllAppsList, BgDataModel dataModel,
-            LoaderResults results) {
+            ModelDelegate modelDelegate, LoaderResults results) {
         mApp = app;
         mBgAllAppsList = bgAllAppsList;
         mBgDataModel = dataModel;
+        mModelDelegate = modelDelegate;
         mResults = results;
 
         mLauncherApps = mApp.getContext().getSystemService(LauncherApps.class);
@@ -767,6 +769,9 @@
                 IOUtils.closeSilently(c);
             }
 
+            // Load delegate items
+            mModelDelegate.loadItems();
+
             // Break early if we've stopped loading
             if (mStopped) {
                 mBgDataModel.clear();
diff --git a/src/com/android/launcher3/model/ModelDelegate.java b/src/com/android/launcher3/model/ModelDelegate.java
new file mode 100644
index 0000000..ce4eed5
--- /dev/null
+++ b/src/com/android/launcher3/model/ModelDelegate.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.launcher3.model;
+
+import static com.android.launcher3.util.PackageManagerHelper.hasShortcutsPermission;
+
+import android.content.Context;
+
+import androidx.annotation.WorkerThread;
+
+import com.android.launcher3.LauncherAppState;
+import com.android.launcher3.R;
+import com.android.launcher3.util.ResourceBasedOverride;
+
+/**
+ * Class to extend LauncherModel functionality to provide extra data
+ */
+public class ModelDelegate implements ResourceBasedOverride {
+
+    /**
+     * Creates and initializes a new instance of the delegate
+     */
+    public static ModelDelegate newInstance(
+            Context context, LauncherAppState app, AllAppsList appsList, BgDataModel dataModel) {
+        ModelDelegate delegate = Overrides.getObject(
+                ModelDelegate.class, context, R.string.model_delegate_class);
+
+        delegate.mApp = app;
+        delegate.mAppsList = appsList;
+        delegate.mDataModel = dataModel;
+        return delegate;
+    }
+
+    protected LauncherAppState mApp;
+    protected AllAppsList mAppsList;
+    protected BgDataModel mDataModel;
+
+    public ModelDelegate() { }
+
+    /**
+     * Called periodically to validate and update any data
+     */
+    @WorkerThread
+    public void validateData() {
+        if (hasShortcutsPermission(mApp.getContext())
+                != mAppsList.hasShortcutHostPermission()) {
+            mApp.getModel().forceReload();
+        }
+    }
+
+    /**
+     * Load delegate items if any in the data model
+     */
+    @WorkerThread
+    public void loadItems() { }
+
+    /**
+     * Called when the delegate is no loner needed
+     */
+    @WorkerThread
+    public void destroy() { }
+}
diff --git a/src/com/android/launcher3/statemanager/StateManager.java b/src/com/android/launcher3/statemanager/StateManager.java
index f1e7f16..60b87d9 100644
--- a/src/com/android/launcher3/statemanager/StateManager.java
+++ b/src/com/android/launcher3/statemanager/StateManager.java
@@ -315,7 +315,6 @@
 
             @Override
             public void onAnimationStart(Animator animation) {
-                super.onAnimationStart(animation);
                 // Change the internal state only when the transition actually starts
                 onStateTransitionStart(state);
             }
diff --git a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
index 858e183..201218b 100644
--- a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
+++ b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
@@ -53,7 +53,6 @@
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.Utilities;
 import com.android.launcher3.common.WidgetUtils;
-import com.android.launcher3.model.AppLaunchTracker;
 import com.android.launcher3.model.data.ItemInfo;
 import com.android.launcher3.statemanager.StateManager;
 import com.android.launcher3.tapl.LauncherInstrumentation;
@@ -272,8 +271,6 @@
         }
 
         mLauncherPid = 0;
-        // Disable app tracker
-        AppLaunchTracker.INSTANCE.initializeForTesting(new AppLaunchTracker());
 
         mTargetContext = InstrumentationRegistry.getTargetContext();
         mTargetPackage = mTargetContext.getPackageName();